The $19.6 Billion Dam Paraguay Couldn't Afford

In the 1970s, Paraguay was one of the poorest countries in South America. It had no coastline, no oil, no gas and no heavy industry, and it was boxed in between Brazil and Argentina. Today it runs almost entirely on clean electricity, and it's one of the biggest electricity exporters in the world per person. The reason is Itaipu, a $19.6 billion dam built across the Paraná River and owned 50/50 by Brazil and Paraguay. Brazil brought the money and the credit. Paraguay couldn't afford its share, so its stake was half the river. Fifty years later, that half turned out to be the most valuable thing the country owns. Building it meant moving one of South America's biggest rivers into a man-made channel, pouring a concrete wall 196 metres tall and more than 7 km long, and solving a problem almost no other dam has faced: feeding two national power grids that run on different frequencies. It also came at a real cost. The reservoir drowned Sete Quedas (Guaíra Falls), once one of the greatest waterfalls on Earth, and about 10,000 families had to be relocated. Since then, Paraguay has spent decades fighting over the price Brazil pays for its surplus power. That fight led to a political crisis in 2019 and a tripled payment deal, and when the construction debt was finally paid off in 2023, it opened the door to rewriting the treaty. This is the story of how half a river turned a landlocked country into an energy superpower. CHAPTERS: 0:00 Paraguay's Big Bet 1:34 The 50/50 Treaty 2:56 Moving the River 3:52 Building the $19.6B Wall 4:54 The Price: Drowning a Waterfall 6:32 One Dam, Two Power Grids 8:11 Paraguay's Half 9:41 The Fight for a Fair Price 10:48 The Payoff 📚 Sources: Itaipu Binacional, UPI archives (1982), MercoPress, Wikipedia (Itaipu Dam, Guaíra Falls). #Itaipu #Megaprojects #Engineering